Citroen Xsara 1.8i Manual, 16 Valv.

Hello, how are you,, I tell you, something ,,, take the car that they revive it, they said that the step by step, it changed it, the problem persists, but when I turn on the air conditioning ,, the car cannot regulate that it stops the march, notice ,, q when I want to use the ventilation, without the air conditioning, the air is turned on. On, and there I stop the car again, for me, now ,,, which can be, you heard something like that, could you guide me, I would appreciate it a hug

Good morning ,,, after fighting several months, I can not find the problem ,,, I remember everything, always some mechanic I get, with another replace Cabie step by step, butterfly, and other things ,,, that advise me ,,, a hug